Bubble level



FIG. 1 is a side perspective view of an embodiment of the claimed design;

FIG. 2 is another side perspective view of the claimed design of claim 1;

FIG. 3 is a top view of the claimed design of FIG. 1;

FIG. 4 is a bottom view of the claimed design of FIG. 1;

FIG. 5 is side view of the claimed design of FIG. 1; and,

FIG. 6 is another side view of the claimed design of FIG. 1. 

CLAIM The ornamental design for a bubble level, as shown and described. 